Running a ram 2500 pulling 10,000lbs 5th wheeler...truck door sticker and tire call for 80psi... when pulling the trailer in the summer the heat of the road increases the psi to 90 is that safe or should I reduce the psi 5lbs or so..any thoughts?????
As long as you are running Light Truck (LT) tires, you should be just fine. Manufacturers take into account the tire pressure is going to go up due to heat buildup. This is why you check tire pressures when they are cold so you don't get a false reading on them. If you lower the pressures to 80psi when hot, you'd actually be causing your tires to overheat due to excess rolling resistance, which will deteriorate them faster and could possibly cause a blowout. Follow what your door sticker states and you'll be golden.